User's Manual

GE864- QUAD Har dwar e User Guide
1vv0300872 Rev.1 2010-04-02
- All Rights Reserved. Page 38 of 77
8. Logic Level Specifications
Wher e not specifically stated, all the interface circuits work at 2.8V CMOS logic
levels. The following table shows the logic level specifications used in the Telit
GE864-QUAD interface circuits:
Absol ute Maximum Ratings –Not Functional
Par am et er
Min
Max
Input level on any
digital pin when on
-0.3V
+3.6V
Input voltage on analog
pins when on
-0.3V
+3.0 V
Oper ating Range – Inter face Level s (2.8V CMOS)
Level
Min
Max
Input high level
2.1V
3.3V
Input low level
0V
0.5V
Output high level
2.2V
3.0V
Output low level
0V
0.35V
For 1.8V signals:
Oper ating Range – Inter face Level s (1.8V CMOS)
Level
Min
Max
Input high level
1.6V
2.2V
Input low level
0V
0.4V
Output high level
1,65V
2.2V
Output low level
0V
0.35V
Cur r ent Char acter istics
Level
Typical
Output Cur r ent
1mA
Input Current
1uA